MapMaster 3

Average acidity of precipitation in the United States. Lower pH values represent greater acidity.

Average January dew points for the contiguous United States

Average July dew points for the contiguous United States

Annual average incidence of hail storms in the contiguous United States

A map showing the largest California wildfires by number of acres burned.

A composite of precipitation anomalies during El Niño from November to March during the following years: 1958, 1966, 1973, 1983, 1987, 1992, 1996, 1998, and 2010. Anomalies are the average precipitation differences from the base period 1951–2010. When sea surface temperatures in the tropical eastern Pacific rise well above normal, it is known as an El Niño event.

A composite of precipitation anomalies during La Niña from November to March during the following years: 1955, 1956, 1965, 1971, 1974, 1976, 1989, 1999, and 2011. Anomalies are the average precipitation differences from the base period 1951–2010. When sea surface temperatures in the tropical eastern Pacific drop below normal, it is known as a La Niña event.

A composite of temperature anomalies during El Niño from November to March during the following years: 1958, 1966, 1973, 1983, 1987, 1992, 1996, 1998, and 2010. Anomalies are the average temperature differences from the base period 1951-2010. When sea surface temperatures in the tropical eastern Pacific rise well above normal, it's known as an El Niño event.

A composite of temperature anomalies during La Niña from November to March during the following years: 1955, 1956, 1965, 1971, 1974, 1976, 1989, 1999, and 2011. Anomalies are the average temperature differences from the base period 1951-2010. When sea surface temperatures in the tropical eastern Pacific drop below normal, it's known as a La Niña event.